American Society of Civil Engineers


Calibration of Nodal Demand in Water Distribution Systems


by Weiping Cheng, (corresponding author), (Associate Professor, College of Civil Engineering and Architecture, Zhejiang Univ., Hangzhou, Zhejiang 310058, China E-mail: ChengWeiping@zju.edu.cn) and Zhiguo He, A.M.ASCE, (Assistant Professor, College of Civil Engineering and Architecture, Zhejiang Univ., Hangzhou, Zhejiang 310058, China. E-mail: hezhiguo@zju.edu.cn)

Journal of Water Resources Planning and Management, Vol. 137, No. 1, January/February 2011, pp. 31-40, (doi:  http://dx.doi.org/10.1061/(ASCE)WR.1943-5452.0000093)

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Document type: Journal Paper
Abstract: This paper presents an optimization methodology to calibrate the nodal demand in the model of water supply distribution systems. The matrix analysis has been carried out to get the sensitive coefficients matrix for the model of water distribution systems. Singular value decomposition is applied to calculate search director of optimization by solving the sensitive coefficients matrix, which is more efficient than the finite-difference method. Two cases are used to show the performance of this algorithm. The first case is a hypothetical water distribution network showing the calculation of the optimization vector. The second case is the application of real-life water distribution system in Hangzhou, China, which shows the determination of the cutoff singular value and the search step size in one-dimensional search. The calibrated model has been also validated using the measured data. The results have shown that the proposed algorithm is reliable and effective in real-time system.


ASCE Subject Headings:
Water distribution systems
Water demand
Calibration
Optimization
China

Author Keywords:
Water distribution network
Nodal demand
Calibration
Optimization
Singular value decomposition (SVD)